CN210707405U - Rail vehicle and bogie thereof - Google Patents

Abstract

The utility model belongs to the technical field of the rail vehicle technique and specifically relates to a rail vehicle and bogie thereof is related to. The bogie comprises a framework, an axle box and a primary suspension device; the top of the primary suspension device is provided with a positioning convex surface, and the bottom of the primary suspension device is in inserted fit with the axle box; the bottom surface of the frame is provided with a series of accommodating concave parts; the convex positioning surface of a suspension device is in concave-convex positioning fit with the concave accommodating part of the framework. The primary suspension device of the bogie is in plug-in fit with the axle box, the primary suspension device is in concave-convex positioning fit with the framework, the bogie has the advantages of being high in positioning speed, short in assembly time and high in production efficiency, and the problems that an existing bogie is difficult to position, time-consuming to assemble and low in assembly efficiency in the process of assembling the primary suspension device can be solved.

Description

Rail vehicle and bogie thereof

Technical Field

The embodiment of the application relates to the technical field of railway vehicles, in particular to a railway vehicle and a bogie thereof.

Background

The existing railway vehicle bogies are generally provided with a primary suspension device, which generally consists of a spiral steel spring, a primary vertical shock absorber and a positioning device, and is installed between an axle box and a bogie frame for bearing vertical load and attenuating vertical vibration. In the assembly process of the bogie, a spiral steel spring of a series of suspension devices and a series of vertical shock absorbers need to be fixedly installed on a framework and an axle box through connecting pieces such as fasteners and the like, so that the problems of complex installation process, difficult positioning, long assembly time and low assembly efficiency are caused.

The inventor finds that the existing bogie has the problems of difficult positioning, time-consuming assembly and low assembly efficiency in the process of assembling the primary suspension device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a rail vehicle and bogie thereof, adopts the cooperation of pegging graft between a linkage suspension device and the axle box of this bogie, adopts unsmooth location fit between a linkage suspension device and the framework, has that the positioning speed is fast, the short and high advantage of production efficiency of assembly time, can solve current bogie have the problem of location difficulty, the assembly takes time and assembly efficiency hangs down at the in-process of assembling a linkage suspension device.

According to a first aspect of embodiments of the present application, there is provided a bogie comprising a frame, an axle box, and a primary suspension device mounted between the axle box and the frame; wherein:

the top of the primary suspension device is provided with a positioning convex surface, and the bottom of the primary suspension device is in inserted fit with the axle box;

the bottom surface of the framework is provided with a series of accommodating concave parts which are used for forming a concave-convex positioning matching structure with the positioning convex surface;

the convex positioning surface of the primary suspension device is in concave-convex positioning fit with the primary accommodating concave part of the framework.

Preferably, the top of the axle box is provided with a first primary positioning pin; the bottom of the primary suspension device is provided with a first primary positioning hole which is used for being in splicing fit with the first primary positioning pin; or the top of the axle box is provided with a second series of positioning holes; and a second series of positioning pins which are used for being in inserting fit with the second series of positioning holes are arranged at the bottom of the first series of hanging devices.

Preferably, the primary suspension device comprises a primary rigid support base layer, a plurality of primary elastic buffer layers and a primary rigid support layer corresponding to the primary elastic buffer layers one by one;

the elastic buffer layer and the rigid support layer are sequentially and alternately arranged on the top of the rigid support base layer in a stacking manner, and the rigid support base layer, the rigid support layer and the elastic buffer layer are fixedly connected into an integral structure;

the top layer of the primary suspension device is the rigid support layer, and the top surface of the primary suspension device forms the positioning convex surface;

the first primary positioning hole or the second primary positioning pin is formed on one side, facing the axle box, of the primary rigid support base layer.

Preferably, the positioning convex surface is an inverted V-shaped surface or an arc-shaped surface with a high middle part and low two sides.

Preferably, the elastic buffer layer and the rigid support layer are of inverted V-shaped structures; the top surface of the rigid supporting base layer is an inverted V-shaped surface matched with the bottom surface of the elastic buffer layer in shape.

Preferably, the elastic buffer layer and the rigid support layer are both arc-shaped structures; the top surface of the rigid supporting base layer is an arc surface matched with the bottom surface of the elastic buffer layer in shape.

Preferably, the rigid support layer is made of a steel plate, and the thickness of the rigid support layer is 2 mm-5 mm.

Preferably, the elastic buffer layer is a rubber layer made of nitrile rubber, and the thickness of the rubber layer is 10 mm-20 mm.

Preferably, the length of the primary suspension device is 200 mm-300 mm, the width is 100 mm-180 mm, and the height is 80 mm-150 mm.

Preferably, the elastic buffer layer, the rigid support base layer and the rigid support layer are integrally formed by vulcanization.

According to a second aspect of embodiments of the present application, there is provided a rail vehicle comprising any one of the bogies provided in the above-mentioned claims.

By adopting the railway vehicle and the bogie thereof provided by the embodiment of the application, as the top of the primary suspension device of the bogie is provided with the positioning convex surface, the bottom surface of the framework is provided with the primary accommodating concave part which forms a concave-convex positioning matching structure with the positioning convex surface, and the bottom of the primary suspension device is in splicing fit with the axle box, when the primary suspension device of the bogie is installed, the primary suspension device, the axle box and the framework can be quickly positioned, and other installation operations are not needed after positioning alignment, therefore, the bogie has the advantages of simple positioning, high speed, short assembly time and high assembly efficiency; meanwhile, when the positioning convex surface adopts an inverted V-shaped surface or an arc surface with a high middle part and low two sides, the positioning convex surface can quickly position, and the framework and the primary suspension device can have a self-centering effect. Therefore, the bogie can solve the problems that the existing bogie has difficulty in positioning, time-consuming assembly and low assembly efficiency in the process of assembling the primary suspension device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic perspective view of a bogie according to an embodiment of the present application;

FIG. 2 is a schematic view of the assembly of a primary suspension, axle boxes and frame of the truck provided in FIG. 1;

FIG. 3 is a schematic illustration of an assembled exploded structure of a suspension system, axle housing and frame as provided in FIG. 2;

FIG. 4 is a schematic perspective view of a suspension system provided in FIG. 3;

FIG. 5 is a cross-sectional view of the A-A direction of a suspension system provided in FIG. 4;

fig. 6 is a schematic perspective view of another bogie provided in an embodiment of the present application.

Reference numerals:

1-a bogie;

11-a framework; 111-a receiving recess;

12-an axle box; 121-a first alignment pin; 122-shaft hole;

13-a primary suspension device; 131-a rigid support substrate; 132-a flexible buffer layer; 133-a rigid support layer; 134-positioning convex surface; 1311-first alignment holes;

14-axle;

15-a wheel;

16-drive means.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the embodiment of the application, the rail vehicle can be a diesel locomotive or an electric locomotive, and can also be a motor train unit, a subway, a light rail or a tramcar and the like; the axial direction of the axle is referred to as the lateral direction, the direction in which the rail vehicle travels is referred to as the longitudinal direction, and the vertical direction is referred to as the vertical direction.

Example one

The embodiment of the application provides a bogie 1, as shown in the structures of fig. 1 and 6, the bogie 1 comprises a framework 11, an axle box 12 and a primary suspension device 13 arranged between the axle box 12 and the framework 11, wherein the axle box 12 can be arranged on an axle 14 through a bearing, so that the axle 14 can rotate relative to the axle box 12; the bogie 1 may further include an axle 14, wheels 15, a drive device 16, a brake device, and the like; the bogie 1 shown in the configuration of fig. 1 is a non-powered bogie, whereas the bogie 1 shown in the configuration of fig. 6 is a powered bogie, the axle 14 of which is provided with a drive 16; wherein:

the top of the primary suspension device 13 is provided with a positioning convex surface 134, and the bottom of the primary suspension device is in inserted fit with the axle box 12; as shown in the structure of fig. 3 and 4, a suspension system 13 may include a rigid support base layer 131, a plurality of elastic buffer layers 132, and a rigid support layer 133 corresponding to the elastic buffer layers 132; the primary suspension device 13 is matched with the primary positioning pin 121 on the top of the axle box 12 through the primary positioning hole 1311 on the primary rigid support base 131 in an inserting manner;

the bottom surface of the frame 11 is provided with a series of accommodating concave parts 111 for forming a concave-convex positioning matching structure with the positioning convex surface 134; the convex positioning surface 134 of the primary suspension device 13 is in concave-convex positioning engagement with the primary receiving recess 111 of the frame 11. As shown in the structure of FIG. 5, the top surface of a primary suspension device 13 forms a positioning convex surface 134 with a high middle part and low two sides; as shown in the structure of fig. 3, the frame 11 has a series of receiving recesses 111 on a side surface facing the series of suspension units 13, which recesses are in shape fit with the positioning convexities 134; the primary suspension device 13 is in concave-convex positioning fit with the framework 11 through the positioning convex surface 134 and the primary accommodating concave part 111, and the framework 11 is pressed on the top of the primary suspension device 13 through the gravity of the vehicle body in the use process.

In the bogie 1, the positioning convex surfaces 134 with high middle and low two sides are arranged at the top of the primary suspension device 13, the primary accommodating concave part 111 matched with the positioning convex surfaces 134 in shape is arranged on the bottom surface of the framework 11, the framework 11 is quickly positioned through the shape matching of the primary accommodating concave part 111 and the positioning convex surfaces 134, a concave-convex positioning matching structure is formed, and in the running process of a railway vehicle, the positioning convex surfaces 134 with high middle and low two sides can induce the framework 11 to automatically center, so that the reliability of the bogie 1 is improved; meanwhile, the primary suspension device 13 can be positioned on the axle box 12 by the insertion fit of the first primary positioning pin 121 and the first primary positioning hole 1311 between the bottom of the primary suspension device 13 and the axle box 12; when installing primary suspension device 13 of bogie 1, can fix a position fast between primary suspension device 13 and framework 11 to need not other installation operations after the location is aimed at, consequently, this bogie 1 has the simple and fast, the short and efficient advantage of assembly of location, and the unsmooth location cooperation structure through framework 11 and primary suspension device 13 still enables framework 11 and primary suspension device 13 to have from the centering function, improves the reliability of bogie 1.

To sum up, the bogie 1 has the characteristics of high positioning speed, short assembling time, high assembling efficiency and self-centering, and can solve the problems of difficult positioning, time-consuming assembling and low assembling efficiency of the conventional bogie 1 in the process of assembling the primary suspension device 13.

The insertion fit between the axle housing 12 and the primary suspension device 13 can be achieved by two embodiments:

firstly, as shown in the structure of fig. 3 and 5, the top of the axle box 12 is provided with a first alignment pin 121, the number of the first alignment pins 121 may be 1, 2 or more, and the arrangement position of the first alignment pin 121 may be determined according to actual needs; the bottom of the primary suspension device 13 is provided with a first primary positioning hole 1311 for inserting and matching with the first primary positioning pin 121. As shown in the structure of fig. 5, two first alignment holes 1311 are provided on the bottom surface of the first rigid support base 131, and the number of the specific first alignment holes 1311 to be provided needs to be calculated according to actual operating conditions, so as to stably and reliably position the first suspension device 13 on the axle box 12; the number and positions of the first alignment pins 121 correspond to the first alignment holes 1311, and in order to improve the versatility and interchangeability of the first suspension device 13, a larger number of first alignment holes 1311 may be disposed on the bottom surface of the first rigid support base 131 to facilitate the use of the axle boxes 12 corresponding to different types; the first alignment holes 1311 may be circular holes, and the diameter of the first alignment holes 1311 may be 20mm to 40mm, for example: 20mm, 25mm, 30mm, 35mm, 40 mm; the first alignment pin 121 of the axle housing 12 and the first alignment hole 1311 of the rigid support base 131 may be in clearance fit.

In the second mode, a second series of positioning holes (not shown) may be disposed on the top of the axle box 12; a second series of positioning pins (not shown) for inserting and matching with the second series of positioning holes are arranged at the bottom of the first series of hanging devices 13.

Because the axle box 12 and the primary suspension device 13 are positioned through the inserting and connecting matching of the corresponding positioning holes and the positioning columns, the positioning is quick and simple, other installation operations are not needed, the positioning columns are matched with the positioning holes in shape, the connection reliability between the axle box 12 and the primary suspension device 13 can be improved, the primary suspension device 13 is prevented from generating displacement in the horizontal direction, and the assembly speed and the assembly efficiency of the bogie are improved.

Specifically, the primary suspension device 13 includes a primary rigid support base layer 131, a plurality of layers of primary elastic buffer layers 132, and a primary rigid support layer 133 corresponding to the primary elastic buffer layers 132 one by one; as shown in the structure of fig. 4, a series of rigid support substrates 131 are located at the bottom of a series of suspension units 13 for mounting the series of suspension units 13 to the axle boxes 12 of the bogie 1; as shown in fig. 2 and 3, a primary suspension device 13 is installed between the axle box 12 and the frame 11, and the primary suspension device 13 can be inserted into and matched with the first primary positioning pin 121 on the top of the axle box 12 through the first primary positioning hole 1311 on the primary rigid support base 131, and positioned with the primary receiving recess 111 of the frame 11 through the top surface forming the positioning convex surface 134;

a series of elastic buffer layers 132 and a series of rigid support layers 133 are sequentially and alternately stacked on top of the series of rigid support base layers 131, and the series of rigid support base layers 131, the series of rigid support layers 133 and the series of elastic buffer layers 132 are fixedly connected into an integral structure; as shown in the structure of fig. 5, the primary suspension device 13 includes a plurality of primary elastic buffer layers 132 and a plurality of primary rigid support layers 133, and the primary elastic buffer layers 132 and the primary rigid support layers 133 are in one-to-one correspondence, that is, the primary suspension device 13 is provided with a plurality of primary elastic buffer layers 132, and a plurality of primary rigid support layers 133 are laminated on the upper portion of each primary elastic buffer layer 132, and are alternately laminated in sequence; the specific number of the elastic buffer layers 132 may be 3, 4, 5, 6, 7, 8, 9, 10, etc., the number of the elastic buffer layers 132 may be set according to actual needs, and meanwhile, the thickness of the elastic buffer layers 132 is also considered, that is, the thickness of the elastic buffer layers 132 is inversely proportional to the number of layers; the elastic buffer layer 132, the rigid support base layer 131 and the rigid support layer 133 can be integrally formed through a vulcanization process, or the elastic buffer layer 132, the rigid support base layer 131 and the rigid support layer 133 can be fixedly connected together through other processes;

the top layer of the primary suspension device 13 is a rigid support layer 133, and the top surface of the primary suspension device 13 forms a positioning convex surface 134; as shown in the structure of fig. 5, the top layer of the primary suspension device 13 is a rigid support layer 133, so as to facilitate the assembly of the primary suspension device 13 with the frame 11 of the bogie 1, a positioning convex surface 134 is arranged on the top surface of the primary suspension device 13, and the positioning convex surface 134 can be an inverted V-shaped surface or an arc-shaped surface with a high middle part and low two sides; the positioning convex surface 134 arranged at the top of the primary suspension device 13 can also be a positioning convex surface 134 with other shapes, and is not limited to the inverted V-shaped surface or the arc-shaped surface with the structure shown in fig. 5, which has a high middle and low two sides, as long as the positioning convex surface can be used in various shapes;

the first alignment holes 1311 or the second alignment pins are formed on a side of the first alignment rigid support base 131 facing the axle boxes 12.

Because the primary rigid support base layer 131 of the primary suspension device 13 is sequentially and alternately stacked with the primary elastic buffer layer 132 and the primary rigid support layer 133, in the using process, the primary elastic buffer layer 132 can relieve, absorb and attenuate vertical vibration, and damp the steering frame 1 and the vehicle body, so that the traditional primary suspension device consisting of a spiral steel spring and a primary vertical vibration damper can be replaced, the primary suspension device 13 has better bearing capacity and vertical vibration damping effect in the vertical direction through the primary elastic buffer layer 132 and the primary rigid support layer 133, and the primary elastic buffer layer 132 has higher flexibility and can deform in the longitudinal direction, thereby effectively compensating the longitudinal deformation of the framework 11, prolonging the service life of the framework 11 and having better longitudinal deformation capacity; meanwhile, as the positioning convex surface 134 matched with the framework 11 in a positioning mode is formed on the top surface of the primary suspension device 13, the primary suspension device 13 can be positioned through the positioning convex surface 134 and the primary accommodating concave part 111 of the framework 11, the alignment speed between the primary suspension device 13 and the framework 11 of the bogie 1 is improved, and the positioning device has the characteristics of convenience and quickness in positioning, so that the assembly efficiency of the bogie 1 is improved.

To form the convex positioning surface 134, as shown in fig. 4 and 5, the elastic buffer layer 132 and the rigid support layer 133 are both inverted V-shaped, such that the top surface of the suspension 13 is formed by two intersecting inclined surfaces, the intersection line of the two inclined surfaces can be located at the middle position of the suspension 13 in the length direction, or at other positions, the top surface of the rigid support base layer 131 is an inverted V-shaped surface that is matched with the bottom surface of the elastic buffer layer 132 in shape, and when the rigid support layer 133 is inverted V-shaped, the included angle α formed between the top surface of the rigid support layer 133 and the horizontal plane can be 5 ° to 10 °, such as 5 °, 6 °, 7 °, 8 °, 9 °, and 10 °.

Because the elastic buffer layer 132 and the rigid support layer 133 are of inverted V-shaped structures, as shown in the structure of FIG. 5, when the frame 11 of the bogie 1 is assembled with the primary suspension device 13, the frame 11 is matched with the positioning convex surface 134 through the accommodating concave part 111, the frame 11 is positioned at the top of the primary suspension device 13, under the action of the self weight of the railway vehicle, the positioning convex surface 134 with a high middle part and low two sides can enable the frame 11 to have an automatic effect, so that the frame 11 is stably installed at the top of the primary suspension device 13, the vibration is reduced, the working reliability of the bogie 1 is improved, and the comfort of the railway vehicle is improved.

Of course, the rigid support layer 133 and the elastic buffer layer 132 on the top of the primary suspension device 13 may be configured as an inverted V-shaped structure, the rigid support layer 133 and the elastic buffer layer 132 on the bottom of the primary suspension device 13 may be configured as a flat plate structure, and the rigid support base 131 may also be configured as a flat plate structure, so that it is not necessary to configure all the rigid support layer 133 and the elastic buffer layer 132 as the inverted V-shaped structure in fig. 5, which is beneficial to reduce the processing difficulty of the primary suspension device 13 and the manufacturing cost.

The top of the suspension device 13 can also form an arc structure similar to the inverted V-shaped structure, and both the elastic buffer layer 132 and the rigid support layer 133 can be arc structures; the top surface of a rigid supporting substrate 131 is an arc surface matching the bottom surface of an elastic buffer layer 132 in shape.

Similarly, a series of rigid support layers 133 and a series of elastic buffer layers 132 at the bottom of the primary suspension device 13 may also be set to be a flat structure, and a series of rigid support base layers 131 may also be set to be a flat structure, so that it is not necessary to set all the series of rigid support layers 133 and the series of elastic buffer layers 132 to be arc structures, and only the series of rigid support layers 133 and the series of elastic buffer layers 132 at the top of the primary suspension device 13 may be set to be arc structures, which is beneficial to reducing the processing difficulty of the primary suspension device 13 and reducing the manufacturing cost.

In addition to the above embodiments, the rigid support layer 133 may be made of a steel plate, and the steel plate may be an alloy steel plate such as a stainless steel plate. The thickness of a rigid support layer 133 may be 2mm to 5mm, for example: 2mm, 3mm, 4mm, 5 mm. The elastic buffer layer 132 may be a rubber layer made of nitrile rubber. The thickness of the elastic buffer layer 132 may be 10mm to 20mm, for example: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20 mm.

The specific thickness of the rigid support layer 133 and the elastic buffer layer 132 can be set according to design parameters and practical requirements, and is not limited to the above-mentioned range, for example, the thickness of the rigid support layer 133 can be greater than 5mm, and the thickness of the elastic buffer layer 132 can be less than 10mm or greater than 20 mm; the vertical load bearing capacity, longitudinal deformability, and vertical vibration damping effect of the primary suspension system 13 can be improved by providing the number of layers and the thickness of the primary rigid support layer 133 and the number of layers and the thickness of the primary elastic cushioning layer 132.

As shown in the structure of fig. 4, the length L of the primary suspension device 13 may be 200mm to 300mm, the width W may be 100mm to 180mm, and the height H may be 100mm to 150mm, during specific production, design and use, the length L of the primary suspension device 13 may be 200mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, and 300mm, the width W of the primary suspension device 13 may be 100mm, 120mm, 130mm, 140mm, 150mm, 160mm, and 180mm, and the height H of the primary suspension device 13 may be 80mm, 85mm, 90mm, 100mm, 110mm, 120mm, 130mm, and 150 mm.

In the actual design, production, manufacturing process, length L, width W and height H of primary suspension device 13 do not all are not limited to above-mentioned size, can adjust according to actual design demand and spatial position, make primary suspension device 13 reduce the volume as far as possible under the prerequisite that satisfies bearing capacity to improve assembly efficiency.

Example two

The embodiment of the application also provides a railway vehicle, and the railway vehicle comprises any one of the bogies 1 provided by the embodiment.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A bogie comprising a frame, an axle housing, and a primary suspension device mounted between the axle housing and the frame; wherein:

the top of the primary suspension device is provided with a positioning convex surface, and the bottom of the primary suspension device is in inserted fit with the axle box;

the bottom surface of the framework is provided with a series of accommodating concave parts which are used for forming a concave-convex positioning matching structure with the positioning convex surface;

the convex positioning surface of the primary suspension device is in concave-convex positioning fit with the primary accommodating concave part of the framework.

2. The bogie according to claim 1, wherein the top of the axle box is provided with a first alignment pin; the bottom of the primary suspension device is provided with a first primary positioning hole which is used for being in splicing fit with the first primary positioning pin; alternatively, the first and second electrodes may be,

the top of the axle box is provided with a second series of positioning holes; and a second series of positioning pins which are used for being in inserting fit with the second series of positioning holes are arranged at the bottom of the first series of hanging devices.

3. The truck of claim 2 wherein said primary suspension means comprises a primary rigid support substrate, a plurality of primary elastomeric cushioning layers, and a primary rigid support layer in one-to-one correspondence with said primary elastomeric cushioning layers;

the elastic buffer layer and the rigid support layer are sequentially and alternately arranged on the top of the rigid support base layer in a stacking manner, and the rigid support base layer, the rigid support layer and the elastic buffer layer are fixedly connected into an integral structure;

the top layer of the primary suspension device is the rigid support layer, and the top surface of the primary suspension device forms the positioning convex surface;

the first primary positioning hole or the second primary positioning pin is formed on one side, facing the axle box, of the primary rigid support base layer.

4. The bogie according to claim 3, wherein the positioning convex surface is an inverted V-shaped surface or an arc-shaped surface with a high middle part and low two sides.

5. The truck of claim 4 wherein said series of resilient cushioning layers and said series of rigid support layers are each of inverted V-shaped configuration; the top surface of the rigid supporting base layer is an inverted V-shaped surface matched with the bottom surface of the elastic buffer layer in shape.

6. The truck of claim 4 wherein said series of resilient cushioning layers and said series of rigid support layers are each arcuate in configuration; the top surface of the rigid supporting base layer is an arc surface matched with the bottom surface of the elastic buffer layer in shape.

7. A bogie as claimed in claim 3 in which the series of rigid support layers are formed from sheet steel and have a thickness of from 2mm to 5 mm.

8. The bogie according to claim 3, wherein the elastic buffer layer is a rubber layer made of nitrile rubber and has a thickness of 10mm to 20 mm.

9. A bogie as claimed in any one of claims 1 to 8 in which the primary suspension means has a length of from 200mm to 300mm, a width of from 100mm to 180mm and a height of from 80mm to 150 mm.

10. A rail vehicle, characterized in that it comprises a bogie according to any one of claims 1-9.

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